Chuanshuoge: tinkercad lcd screen

Tuesday, June 7, 2022

#include <LiquidCrystal.h>

char text1[] = " Time up is";

unsigned long t;

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

void setup()

{

lcd.begin(16, 2);

lcd.setCursor(0, 0);

lcd.print(text1);

TCCR1A = 0b00000000; //TCCR1A bit 0, 1 and TCCR1B bit 3, 4 set timer mode

TCCR1B = 0b00001101; //Set mode to be clear on compare. set scaler to be clock/1024

OCR1A = 15624; //period = (OCR1A/B + 1)*scaler*62.5ns = 1s

TIMSK1 = 0b00000010; //enable timer counter

sei();

}

void loop()

{

}

ISR(TIMER1_COMPA_vect){

t = millis();

lcd.setCursor(0, 1);

lcd.print(" ");

lcd.print(t/1000);

lcd.print("s");

}

reference:

timer

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